[dazp1976]

Good question on the jumpers. I don't have the manual or even a model number for the motor. I do know it is a Mitsubishi 3.7KW. I can run it forward and reverse. The only thing that's not working now is the speed. The MB3 board is outputting a higher voltage with a lower S word and a lower voltage with a higher S word.

Every other board I've used has been able to reverse this just by changing active high/low on the STEP pin in Mach3 > motor outputs > spindle > step > H/L.
If relays are working fine don't change the dir one.

Afaic if using pwm/analog, Mach just directs the step setting to either the pwm or s/d depending on your chosen preference.